Which hand tool is best to cut a slot in a steel pipe, outside?

Vintage Wooden Pipe Stand With Brown Glass Humidor 8 Slot Pipe slot pipe
➡️【Mk.com】✅यह स्थान दिन के 24 घंटे खुला रहता है✅, जिसमें ब्लैकजैक, लिमिट और नो-लिमिट टेक्सास होल्डम, नो-लिमिट ईज़ी बैकारेट, थ्री कार्ड पोकर, पै गो पोकर और बहुत कुछ जैसे गेम उपलब्ध हैं। ✅  Stainless Steel Slotted Pipe · Minimum Order Quantity: 100 Foot · Length of Pipe: 3 m · Shape: Round · Material Grade: SS304 · Size: 12 inch · Unit Pipe Length slot menang banyak I want to use the new tab and slot feature on a Weldment that is made of round pipe But I get this from SolidWorks

slot john hunter Hose pipe clips possess stable structure, excellent performance and long service life · Authentic durable 304 stainless steel, possess good quality, rust‑proof